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1 hydrogen an WhOSE. post-ofice address This March and the invention antenna,

Rte Enemar.

To all whom it may concern:

lie it lmown that We, Rorann 0. 1E. Davis and v Hannr BRYAN, citizen of the United States and em loyees oi the Department or" Agriculture oi the United States of America, residing. in the District of Columbia, is Washin on, and useful rooare invented a new h an mn,

ess for the Recovery of application a, 1883, Chapter 143 (22 Sea. 625) 0 herein describe claimed may be used by the Government of the United States or any of its ofioers or employees in the grosecution of work for the Government, b

Uur invention relates to the production of ammonia 'by gassing a mixture of gaseous nitrogen either mixed or alternately over a catalytic agent and re moving the ammonia formed by absorption in a solid or liquid from which the ammonia may be; later evolved by subjectingto heat or reduced pressure and collected in the manner desired. By a well pfioceis, yt e production of a low temperature in the circulating gases whereby the ammonia is partially liquefied. J memo is completely temperatures, and is heating the absorbent absorbed at ordinary recovered either by in any desired manner or subjecting it to yacuum when the amand may be collected as anhydrous ammonia, or toy be used as gaseous ammonia for oxidation or other chemical reactions. The process may he made ration of ammonia either under increased pressure, at ordinary pres-4 sure, or under vacuum.

We have found charcoal to he a valuahle fiyccti'ioation of hetters Patent. Application filed Hay ill, with. {lllhhh lillt'hhlt THE acres with d, 1833, 2Q Elhl.

is mac under 'Act oi and y any person in the. nited States without payment to us of any royalty thereon. I

consisting in the ab In our method the amd charcoal by Y. recanted can an rein Serial his. WWI-1d.

can.

agent for the absorption of ammonia in the manner described but other substances or mixtures of other substances capable of absorbing be employed. We do to limit the application of our procchemicals as for instance caloiummhlorid, ammonium nitrate, etc., show the property of absorbin ammonia and all shch are included in this claim. Furthermore, liquids, for instance, water, may be used for the same purpose, and the ammonia later volatilized and collected by cooling,

at We claim is: v e process oi recoyering ammonia formed by passing a mixtu e of gaseous hydrogen and nitrogen over a; catalytic agent, sorption at ordinary temperatures of said ammonia in charcoal, and'in then liberating the said from the charcoal by the application of a vacuum thereto, and'in subsequently collecting said ammonia loy cooling 2. The process of recovering ammonia formed by passing a mixture the application of a vacuum thereto, and in subsequently collecting said ammonia by the use of an acid.

testimony whereof We afix our signatures in the presence of two subscribing witnesses.

ROYA'EL 0.. E. DAVIS. HARRY BRYAN} Witnesses:

J. P. Sozsmononn,' A, G. RICE. 

